Rotary brush



July 23, 1929. J. B. CARLSON 1,721,655

ROTARY BRUSH Original File F 8, 1928 Inventor Allor ney Patented July 23, 1929. Q.

UNITED STATES JOHN B. CARLSON, OF KIRKLAND, WASHINGTON.

.' ROTARY BRUSH.

Application filed February 8, 1928, Serial No. 252,705.

My present invention relates to improvements in rotary brushes of the type driven by electricity and'through the actuation of a flexible shaft.

The primary object of the invention is the provision of a hand controlled or manipulated rotary brush which is adapted for cleaning or brushing various articles and which may be manipulated with facility for performing this function. The brush may be provided with tufts of bristles or of wire, or the tufts may be made of other suitable and desirable material.

In carrying out my invention the parts are combined, arranged and constructed with simplicity and the resulting tool is smooth in its operation and composed of a minimum number of parts to insure the proper performance of its functions.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention and a slightly modified form thereof, in which the parts are combined and arranged according to the best mode I have so far devised for the practical application of the principles of my invention.

Figure 1 is a plan view partly broken away and partly in section showing the embodiment of my invention.

Fig. 2 is a transverse sectional view of one of the brushes.

Fig. 3 is an end view of the tool or device.

Fig. 4 is an enlarged detail sectional view showing the end of the flexible shaft connected to the drive shaft.

Fig. 5 is a plan view with parts broken away showing a modified form of the brush or the tool.

In carrying out my invention according to Fig. 1, I use a pair of axially alined brushes 1 and 2 which are provided with tufts of bristles, wire or other suitable material depending upon the use to which the brush is to be applied.

The two brushes are supported upon and revolve with a single brush shaft 3 which is journalled in intermediate bearings 44. and end bearings 5 of the frame 6.

0 Each brush comprises a cylinder 7 having an integral closed end or fixed head 8 and at the opposite end of the cylinder a collar 9 is fixed to the brush shaft by the transverse pin 10. This collar is provided with an annular flange 11 and with longitudinally extending Renewed March 28, 1929.

exterior peripheral grooves 12 with which complementary ribs 13 on the inner face of the cylinder are adapted to frictionally engage. Thus it will be apparent that the collar which is rigid with the rotary shaft receives the inner open end of the cylinder and the complementary grooves and ribs lock the cylinder on the collar so that thebrush will rotate with the shaft.

The outer ends of the brush shaft are threaded to receive clamp nuts 14: to clamp the cylinder upon the collar, and between the nut 14 and the integral head 8 of the cylinder a guard plate 15 is supported. This guard plate has a slotted shank 16 over the outer end of the brush shaft, and the guard plate as shown in Fig. 3 extends beyond the periphery of the cylinder in order to protect the brush. Thus with the guard in the position of Fig. 3 it is impossible to mash the bristles of the brush or to exert pressure on the brush that would jam the brush in its rotation and stop the operation thereof. The guard plates 15, one at each end of the shaft, may be adjusted by means of the slotted shank and nut 14.

A hood 17 is provided for the two brushes and it extends longitudinally thereof and is fastened to the frame portion 6.

At the central portion of the brush shaft a bevel gear couple, 18, 19 is provided, the gear 18 being fixed on the brush shaft, and the gear 19 fixed on the perpendicularly arranged driving shaft 20 which is enclosed within the tubular housing 21 that is rigid with the frame bars 6.

The flexible shaft 22 receives power from any suitable source and enters the handle 23 and is operatively connected with the drive shaft 20 as indicated in Fig. 4. It will be apparent that when the flexible shaft 22 is driven, and the tool handle 26 used for supporting the tool, the latter may be manipulated to brush any desired or suitable object.

In Fig. 5 a single brush as 2 is utilized on the brush shaft 24 and this brush shaft is driven from the perpendicularly arranged drive shaft 25 that is enclosed in the housing 26 which forms the handle for the tool.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a main shaft and a supporting frame therefor including a tubular housing, a drive shaft in said housing and a gear couple between the drive shaft a collar on the brush shaft having a stop 10 and the main shaft, and a brush on said main shaft comprising a cylinder having one closed integral head and an open opposite end, a

" collar rigid With the brush shaft, and means for locking said cylinder on the collar.

2. In a rotary brush device, the combination with a brush shaft of a cylinder having bristles thereon, a closed end to the cylinder,

flange, said collar having longitudinal grooves, and said cylinder having complementary ribs for engagement With the grooves and means for clamping the cylinder on the shaft.

In testimony whereof I aflix my signature.

JOHN B. OAR-LSON. 

